Merged revisions 290713 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r290713 | russell | 2010-10-07 13:00:52 +0200 (Thu, 07 Oct 2010) | 11 lines
  
  Merged revisions 290712 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
  ........
    r290712 | russell | 2010-10-07 12:53:56 +0200 (Thu, 07 Oct 2010) | 4 lines
    
    Don't crash when Set() is called without a value.
    
    Review: https://reviewboard.asterisk.org/r/949/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@290714 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/pbx.c

@@ -9550,11 +9550,18 @@ int pbx_builtin_setvar(struct ast_channel *chan, const char *data)
 	mydata = ast_strdupa(data);
 	name = strsep(&mydata, "=");
 	value = mydata;
-	if (strchr(name, ' '))
+	if (!value) {
+		ast_log(LOG_WARNING, "Set requires an '=' to be a valid assignment.\n");
+		return 0;
+	}
+
+	if (strchr(name, ' ')) {
 		ast_log(LOG_WARNING, "Please avoid unnecessary spaces on variables as it may lead to unexpected results ('%s' set to '%s').\n", name, mydata);
+	}
 
 	pbx_builtin_setvar_helper(chan, name, value);
-	return(0);
+
+	return 0;
 }
 
 int pbx_builtin_setvar_multiple(struct ast_channel *chan, const char *vdata)